Water report · not indexed
What is in the water at 90201
7 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
GSWC - BELL, BELL GARDENS
PWSID CA1910011 · CA · serves 54,877 people
PFAS and lithium
7 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 10 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 47 µg/L | 3 | 4/28/2025 |
| PFOS | 0.015 µg/L | 2 | 7/8/2025 |
| PFBA | 0.011 µg/L | 1 | 7/7/2025 |
| PFPeA | 0.0073 µg/L | 1 | 1/6/2025 |
| PFHxA | 0.0066 µg/L | 1 | 1/6/2025 |
| PFBS | 0.0041 µg/L | 1 | 1/6/2025 |
| PFHxS | 0.0036 µg/L | 1 | 7/8/2025 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
CALIFORNIA WATER SERVICE CO. - ELA
PWSID CA1910036 · CA · serves 152,474 people
PFAS and lithium
6 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 25 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 47 µg/L | 6 | 7/16/2025 |
| PFPeA | 0.013 µg/L | 5 | 7/16/2025 |
| PFOS | 0.0086 µg/L | 2 | 7/22/2025 |
| PFBA | 0.008 µg/L | 5 | 7/15/2025 |
| PFHxA | 0.0076 µg/L | 4 | 7/16/2025 |
| PFBS | 0.0049 µg/L | 3 | 7/15/2025 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Too few readings to state a hardness. 1 station(s), 1 result(s). Below two stations and five results this page will not state a number: a median of two readings from one creek is not your water.
COMMERCE-CITY, WATER DEPT.
PWSID CA1910050 · CA · serves 4,205 people
PFAS and lithium
7 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 14 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 66 µg/L | 4 | 8/13/2024 |
| PFPeA | 0.017 µg/L | 2 | 8/13/2024 |
| PFHxA | 0.014 µg/L | 2 | 8/13/2024 |
| PFBS | 0.0097 µg/L | 2 | 8/13/2024 |
| PFOA | 0.0093 µg/L | 1 | 8/13/2024 |
| PFBA | 0.0075 µg/L | 2 | 8/13/2024 |
| PFHpA | 0.0051 µg/L | 1 | 8/13/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Too few readings to state a hardness. 3 station(s), 3 result(s). Below two stations and five results this page will not state a number: a median of two readings from one creek is not your water.
MAYWOOD MUTUAL WATER CO. #3
PWSID CA1910086 · CA · serves 9,500 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 13 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 22 µg/L | 3 | 8/12/2024 |
| PFOS | 0.026 µg/L | 4 | 8/12/2024 |
| PFOA | 0.0073 µg/L | 3 | 8/12/2024 |
| PFHxS | 0.0061 µg/L | 3 | 8/12/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Too few readings to state a hardness. 1 station(s), 2 result(s). Below two stations and five results this page will not state a number: a median of two readings from one creek is not your water.
CITY OF BELL GARDENS
PWSID CA1910108 · CA · serves 11,437 people
PFAS and lithium
8 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 17 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 61 µg/L | 4 | 8/13/2024 |
| PFOS | 0.023 µg/L | 2 | 8/13/2024 |
| PFOA | 0.014 µg/L | 2 | 8/13/2024 |
| PFHxA | 0.0094 µg/L | 2 | 8/13/2024 |
| PFPeA | 0.0089 µg/L | 2 | 8/13/2024 |
| PFBS | 0.0059 µg/L | 2 | 8/13/2024 |
| PFHpA | 0.0045 µg/L | 2 | 8/13/2024 |
| PFHxS | 0.0039 µg/L | 1 | 7/19/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
TRACT 180 MUTUAL WATER CO.
PWSID CA1910159 · CA · serves 14,000 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 13 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFOS | 0.024 µg/L | 4 | 9/20/2024 |
| PFOA | 0.0065 µg/L | 4 | 9/20/2024 |
| PFHxS | 0.0059 µg/L | 4 | 9/20/2024 |
| PFHxA | 0.0031 µg/L | 1 | 9/20/2024 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
TRACT 349 MUTUAL WATER CO.
PWSID CA1910160 · CA · serves 8,700 people
PFAS and lithium
4 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 7 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| PFOS | 0.037 µg/L | 2 | 9/12/2023 |
| PFOA | 0.0082 µg/L | 2 | 9/12/2023 |
| PFHxS | 0.0066 µg/L | 2 | 9/12/2023 |
| PFBA | 0.0053 µg/L | 1 | 9/12/2023 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01.